Carpet-sweeper brush-drive mechanism



Dec. 30, 1930. F. w. PULLEN 5,

v CARPET SWEEPER BRUSH DRIVE MECHANISM Filed June 4, 1928 2 SheetsSheet 1 INVENTOR FreJfl/aZZar- Puller). V

MW raw! A TTORNE Y Dec. 30, 1930. F. w. PULLEN 1,785,354

- CARPET SWEEPER BRUSH DRIVE MECHANISM Filed June 4, 1928 2 Sheets-Sheet 2 A TTORNE Y Patented Dec, 39, 1830 UNITED STATES FBED WALTER PULLEN, OF GRAND RAPIDS, MICHIGAN, ASSIGNOB TO. IBISSELL SWEEPER COMPANY, OFJGRAND RAPIDS, MICHIGAN PATENT orrlca CARPET CARPET-SWEEIPER BRUSH-DRIVE MECHANISM Application filed June 4, 1928. Serial No. 282,580.

This invention relates to an improved carpet sweeper brush drive mechanism.

The objects of the invention are:

First, to provide improved means of automatically controllin the relative height of the brush and floor w eels under varying conditions.

Second, to provide improved adjusting fulcrumed connections between the floor wheels and brush. 1

Third, to provide an improved automatically adjustable slide support for the brush pivot.

Objects relating to details of construction and operation will appear from the detailed description to follow. The'invention is de fined in the claims. Structures embodying my invention are clearly illustrated in the accompanying drawings, in which i Fig. 1 is an end view of a carpet sweeper of regular Bissell design incorporating my improved brush control mechanism. g

' Fig. 2 is a detail sectional plan view of one end of the carpet sweeper taken on the irregular section line 22 of Fig. 1

Fig. 3 is a vertical detail sectional view on line 33 of Figs. 1 and 2, showing the brush pivot in engaged position.

Fig. 4 is a sectional view similar to Fig. 3 showing brush pivot withdrawn to permit the removal of the brush.

Fig. 5 is an enlarged detail sectional view on the line 2-2 of Figs. land 3 showing the relation of the spring slide and the slotted connection of the lever.

Fig. 6 is an enlarged detail fragmentary elevation view from the inside of the levers as illustrated in Fig. 2 showing the brush pivot engaged by theslotted levers and the disposition and arrangement of the slide on the spring slide-way.

Fi .7 1s a detail plan view similar to Fig. 2 wit the various parts in separated relation, the brush and case being omitted.

The parts of the drawmg will be identified by their numerals of reference which are the same in all the views. a I

1 is the carpet sweeper case having ends 2 and extension sides 3 ming a recess for the the spring slide deflected and the,

brush driving mechanism. 4 is the end plate secured to the extensions 3.by suitable screws 41. 5 are the'floor wheels carried on a pair of axles 6 at each side, the opposite ends of the sweeper being identical. 7 is the carpet sweeper brush having a friction pulley 71 yieldingly engaged by the floor wheels. The floor wheels have extended hubs 51 embraced by bearings, the outer case 52 of which has extended arms 53.

A spring 8 is folded centrally and carried by the stud 9 and has laterally disposed ends engaging'the extended arms 53 of the bearings, thus tensioning the floor wheels in the manner in which such wheels are tensioned on a Bissell carpet sweeper. A slide 10 is on a blade spring 11 which is secured by the stud 9. To the slide 10 is secured the brush pivot 12. The slide is adapted to play up and down in a slot 42 in the plate 4. The spring permits the brush pivot to be readily withdrawn from r the brush, thus permitting its removal.

When the brush is engaged the slide'will play up and down on the blade spring 11 very freely.

Iprovide equalizing lever supports 13 between the floor wheels and the brush. These are carried on fulcrum pins 15 on theend plates 4. In the preferred construction, pivot pins 131 on the outer ends of the lever 13 enter into the hubs 51 of the floor wheels which are journaled therein. The lever 13 is slotted centrally at 132 for the fulcrum pin 15 and at its inner end or the brush end it is slotted at 133 where it engages the brush pivot 12. 12, as already indicated, is the brush the carpet sweeper is manipulated the brush will adjust itself to the floor level whether that be a carpet or rug with a lon pile or a hard surface carpet or even a hard oor. The brush automatically takes the correct position to properly sweep the surface over which the carpet sweeper is passed. This is done auto T matically by the action of the carpet sweeper when it is manipulated. The action of the ,floor wheels, while free, is equalized.

'The adjustment of the levers is independent of the spring pressure of the floor-wheels on the brush pulley so'that there is no interference with the proper drive of the brush when the adjustment takes place.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: I

1. In a carpet sweeper structure the combination of a case having extended side s, an end plate connected to sa d extension sides and having an aperture at the center, a slide in said aperture, a brush pivot secured to the said slide, a carpet sweeper brush with a drive pulley journaled on the said ivot, a

- blade spring secured at one of its en s to the a nation of a case having an end plate, a slide, a

end plate and serving as a way for said slide to support the same yieldingl in position, floor wheels to contact with t e said brush and having hubs, bearings embracing said hubs and having projecting arms, a com ression spring secured to the end plate 0 the case and connected to said arms for tensioning said floor wheels,-levers with journal pins extended into the hubs of the said floor wheels and having central fulcrum slots and slotted inner ends embracing the brush pivot, and fulcrum pins on the end plates for said levers, as specified. g

2. In a carpet sweeper structure the combibrush pivot secured to the said slide on which the carpet sweeper brush journals, a carpet sweeper brush with drive pulley journaled on said pivot, a blade springserving as a way for the said slide secured at one end to the @nd plate to yieldingly support the "slide in position, floor wheels for the said carpet sweeper and means for maintaining yielding contact between the floor wheels and the drive pulley 'of the brush, and levers having their midportions ivoted to said late and their ends connecte to said floor w eels and'the brush, as specified. a

3. In a carpet sweeper structure the combi- I, nation of a case having an end plate, a slide, a

brush pivot secured-to the said slide on which the carpet sweeper brush journals, a car t sweeper brush with drive pulley journa ed on said pivot, a blade spring servmg as a way for the said slide secured at one end to the end plate to yieldin 1y support the slide in position, floor wheed sweeper and means for maintaining 'eldmg contact between the floor wheels andt e drive pulley of the brush, as specified. h Iniwitness whereof I have hereunto set my all \V v FRED WALTER PULLEN.

s for the said carpet 

